Identification and Quantification of Intracoordination Water in Insoluble Pectinates Cu²⁺and Pb²⁺  

作　　者：Nelli Shalikovna Kajsheva Alexander Shalikovich Kajshev Borisovna Anna Samoryadova Kristina Vladimirovna Smolenskaya Galina Vladimirovna Smolenskaya 

机构地区：[1]Pyatigorsk Medical and Pharmaceutical Institute—A Branch of Federal State-Funded Educational Institution of Higher Vocational Education VolgSMU of Health Ministry of the Russian Federation, Pyatigorsk, Russia

出　　处：《American Journal of Analytical Chemistry》2017年第3期210-224,共15页美国分析化学（英文）

摘　　要：By derivatography in insoluble pectins Cu2+ (РCu2+) and Pb2+ (РPb2+), the presence of “a high-temperature component” (150°C- 165°C) is established. During potentiometric alkalimetric titration of РCu2+ and РPb2+, endpoints are established at рН accordingly 4.87 and 4.95, proving acid properties of PM. Obtained data show the presence of water in the internal sphere of PM. Considering the loss of this water and the known ratio of metal cations and monomers of pectin (L-), the simplest formulas of pectins are established: [Cu(L-)2(H2O)2], [Pb(L-)2(H2O)4].By derivatography in insoluble pectins Cu2+ (РCu2+) and Pb2+ (РPb2+), the presence of “a high-temperature component” (150°C- 165°C) is established. During potentiometric alkalimetric titration of РCu2+ and РPb2+, endpoints are established at рН accordingly 4.87 and 4.95, proving acid properties of PM. Obtained data show the presence of water in the internal sphere of PM. Considering the loss of this water and the known ratio of metal cations and monomers of pectin (L-), the simplest formulas of pectins are established: [Cu(L-)2(H2O)2], [Pb(L-)2(H2O)4].

关 键 词：Coordination Connections Pectinates of Metals IONS of Copper (II) IONS of Lead (II) Composition Derivatography POTENTIOMETRY 

分 类 号：O6[理学—化学]